Port Royal/CSO
Storm overflow operated by Yorkshire Water. The source names Tributary of River Foulness as the receiving water.
- 0
- Spills in 2025
- 0
- Recorded hours
- 99.9%
- Monitor operation
- 6
- Years listed
The reported spill count was 1 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Port Royal/CSO recorded no spills in 2025. It is one of 2,231 overflows in England with a reported count of zero, out of 14,239 with a count.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 0 | 0 |
| England | 12,009th of 14,239 | 11 | 22.3 |
| Yorkshire Water | 1,886th of 2,176 | 16 | 37.8 |
| Foulness from Black Beck to Market Weighton Canal | 8th of 10 | 4.5 | 18.1 |
Rank 1 has the most spills. Equal counts share a rank. Only overflows with a reported count are ranked. Counts do not measure volume, so a higher rank does not mean more sewage.
Annual spill history
| Year | Spills | Duration | Monitor operation | Source |
|---|---|---|---|---|
| 2025 | 0 | 0 hours | 99.9% | Official data |
| 2024 | 1 | 0.5 hours | 100% | Official data |
| 2023 | 1 | 2 hours | 99.9% | Official data |
| 2022 | 0 | 0 hours | 97.3% | Official data |
| 2021 | 0 | 0 hours | 82.7%Low coverage | Official data |
| 2020 | 0 | 0 hours | 94% | Official data |
A missing figure means the source did not provide a usable value. A zero is shown as zero. Monitor operation below 90% can make comparison less reliable.
Outlet details
- Water company
- Yorkshire Water
- Outlet type
- Storm overflow on the sewer network
- Permit
- WADC1240
- Activity reference
- A2
- Grid reference
- SE8151037590
- Waterbody ID
- GB104026066690Official waterbody record ↗
- Location source
- Official annual grid reference
- Location precision
- About 1 metres
- Location note
- Unknown
About the name and type
The annual return lists this asset as “SO on sewer network”: storm overflow on the sewer network. The return places this overflow on the sewer network.
The waterbody link opens the Environment Agency record for the exact ID in the return. It is a source lookup; we do not import its classification.
Where it is
The recorded position is about 1.1 km south-east of the Holme upon Spalding Moor reference point in the ONS built-up areas data.
Area and water pages
Check the official record
Public access to this outlet is unknown. Do not enter restricted land or use this page as a route guide.
Open official source ↗Other outlet records nearby
- Holme On Spalding Mr/STWCurrent status unknown
Yorkshire Water · Main Drain
- Everingham Hall/SPSCurrent status unknown
Yorkshire Water · Permit applied for
- Market Weighton/No 2 STWCurrent status unknown
Yorkshire Water · Market Weighton Beck
- Shiptonthorpe/CSOCurrent status unknown
Yorkshire Water · River Foulness Or Shipton Beck
Questions about Port Royal/CSO
- Who operates Port Royal/CSO?
- Yorkshire Water is the operator named in the annual record. The permit reference is WADC1240.
- Where does Port Royal/CSO discharge?
- The source names Tributary of River Foulness as the receiving water. This does not show how far a discharge travelled.
- How many times did Port Royal/CSO spill in 2025?
- The 2025 return records 0 counted spill events and 0 hours of recorded discharge. Spills are counted with the 12/24-hour method, so this is not a count of every start signal.
- Can I trust the 2025 figures for this outlet?
- The monitor worked for 99.9% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Port Royal/CSO discharging right now?
- This record is linked to a company live feed. The panel above shows the latest report we hold, with its date. That report can be old, and the monitor can be offline, so check the date before relying on it. A report that no discharge is taking place is not a water-quality result.
- How accurate is the map marker?
- The marker comes from the grid reference in the official annual return, which is accurate to about 1 metres. It shows the recorded outlet position, not the extent of any discharge.
- What kind of outlet is Port Royal/CSO?
- The annual return lists the asset type as “SO on sewer network”, which means storm overflow on the sewer network. The return places this overflow on the sewer network.
- How does Port Royal/CSO compare with other overflows?
- Port Royal/CSO recorded no spills in 2025. It is one of 2,231 overflows in England with a reported count of zero, out of 14,239 with a count. Ranks compare counted spill events only. They do not compare volume or harm.
- Does zero spills mean the water was safe?
- No. A zero means the annual return recorded zero counted spill events for this outlet and year. It is not a water-quality test, and pollution can come from other sources.